Source code for pyomo.core.plugins.transform.hierarchy
# ___________________________________________________________________________
#
# Pyomo: Python Optimization Modeling Objects
# Copyright (c) 2008-2024
# National Technology and Engineering Solutions of Sandia, LLC
# Under the terms of Contract DE-NA0003525 with National Technology and
# Engineering Solutions of Sandia, LLC, the U.S. Government retains certain
# rights in this software.
# This software is distributed under the 3-clause BSD License.
# ___________________________________________________________________________
from pyomo.core.base import Transformation
[docs]
class AbstractTransformation(Transformation):
"""
Base class for all model transformations that produce abstract
models.
"""
[docs]
def __init__(self, **kwds):
kwds["name"] = kwds.get("name", "abstract_transformation")
super(AbstractTransformation, self).__init__(**kwds)
[docs]
class ConcreteTransformation(Transformation):
"""
Base class for all model transformations that produce concrete
models.
"""
[docs]
def __init__(self, **kwds):
kwds["name"] = kwds.get("name", "concrete_transformation")
super(ConcreteTransformation, self).__init__(**kwds)
[docs]
class IsomorphicTransformation(Transformation):
"""
Base class for 'lossless' transformations for which a bijective
mapping between optimal variable values and the optimal cost
exists.
"""
[docs]
def __init__(self, **kwds):
kwds["name"] = kwds.get("name", "isomorphic_transformation")
super(IsomorphicTransformation, self).__init__(**kwds)
[docs]
class LinearTransformation(Transformation):
"""Base class for all linear model transformations."""
[docs]
def __init__(self, **kwds):
kwds["name"] = kwds.get("name", "linear_transform")
super(LinearTransformation, self).__init__(**kwds)
[docs]
class NonIsomorphicTransformation(Transformation):
"""
Base class for 'lossy' transformations for which a bijective
mapping between optimal variable values and the optimal cost does
not exist.
"""
[docs]
def __init__(self, **kwds):
kwds["name"] = kwds.get("name", "isomorphic_transformation")
super(NonIsomorphicTransformation, self).__init__(**kwds)